The Ultimate ChatGPT 5 Model Comparison: GPT-5.0 vs 5.1 vs 5.2 vs 5.3 vs 5.4 vs 5.5
OpenAI dropped GPT-5.5 on April 23, 2026, and it is now the most capable ChatGPT model the company ships. GPT-5.5 scores 93.6% on GPQA Diamond, 82.7% on Terminal-Bench 2.0, and 78.7% on OSWorld-Verified, all ahead of GPT-5.4, while its Pro variant pushes BrowseComp to 90.1% and FrontierMath Tier 4 to 39.6%. In under nine months, […]
